Rust crate owner · data Oct 24, 2026
mmastrac: Rust crates and real downloads
Every crate mmastrac can publish on crates.io, among the top 1000. mmastrac on GitHub · on crates.io
Short answerMatt Mastracci (crates.io mmastrac) owns 1 of the 1000 most-downloaded Rust crates. Together they get about 686,862 real downloads a day on quiet days (release-day spikes removed), rank #301 of the 492 owners we track. The biggest is ctor at 686,862 a day with 848 crates depending on it. 1 shipped a release in the last 90 days; 1 are gaining on the field and 0 losing ground.
Their crates, by real downloads
| Crate | Real downloads a day | Dependents | Trend vs field | Last release | crates.io rank |
|---|---|---|---|---|---|
| ctor Established | 686,862 | 848 | +10% | 2mo | #537 |
Mostly in: No standard library (1), Build Utils (1), Procedural macro helpers (1), No dynamic allocation (1), Embedded development (1).
Check any crates.io account
This page covers crates in the top 1000. For every crate an account owns, live, use Check your crates.
How we count
Owners: crates.io owners API (users only; teams are not listed), fetched Oct 24, 2026. Real downloads a day = the median day with no release that day or the day before, per crate, summed. Trend = last 30 days against the first 30, read against the median tracked crate. Method: our crates.io study.
Up next
The next owner by real downloads: 1 top crates, about 683,325 real downloads a day.rozbbRead it next →Also worth your time